TABLE III -.

Average changes in spectral-domain HRV-alone measures, including low frequency (LF, in msec²), high frequency (HF, in msec²), ratio (LF/HF, unitless), and total spectral power (TSP=LF+HF, in msec²), for each subgroup and agent

Change	ΔLFnu (msec2)	ΔHFnu (msec2)	ΔLF/HF (unitless)	ΔTSP (msec2)
The LF and HF are normalized values indicated by “nu.” Significance of changes are marked (*p<0.010 or **p<0.001). See Table I for more details. See text for discussion.
(+)Carvedilol	−1.01	1.27	−0.06	240.9**
(+)Metoprolol	−2.27	2.11	−1.61*	−42.2*
(−)Carvedilol	2.80	−1.20*	−0.55*	−32.6
(−)Metoprolol	−0.80	0.46	0.58*	−658.7*
(o)Carvedilol	−0.34*	0.77*	−0.08	116.5
(o)Metoprolol	0.40	−0.68*	0.16	−141.5